diff options
author | Jiri Kosina <jkosina@suse.com> | 2024-05-14 14:44:49 +0300 |
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committer | Jiri Kosina <jkosina@suse.com> | 2024-05-14 14:44:49 +0300 |
commit | e29fd84c5b49085cf27e1d5f27237d2fb19edefe (patch) | |
tree | b603f41d1b410d9c24ab34ab42e44edca819c43f /drivers/hid/bpf/progs/IOGEAR__Kaliber-MMOmentum.bpf.c | |
parent | bc5fbae23a880ebe42d4843294667e932379fb71 (diff) | |
parent | 89ea968a9d759f71ac7b8d50949a8e5e5bcb1111 (diff) | |
download | linux-e29fd84c5b49085cf27e1d5f27237d2fb19edefe.tar.xz |
Merge branch 'for-6.10/hid-bpf' into for-linus
- updates to HID-BPF infrastructure, with some of the specific
fixes (e.g. rdesc fixups) abstracted into separate BPF programs
for consumption by libevdev/udev-hid-bpf (Benjamin Tissoires)
Diffstat (limited to 'drivers/hid/bpf/progs/IOGEAR__Kaliber-MMOmentum.bpf.c')
-rw-r--r-- | drivers/hid/bpf/progs/IOGEAR__Kaliber-MMOmentum.bpf.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/hid/bpf/progs/IOGEAR__Kaliber-MMOmentum.bpf.c b/drivers/hid/bpf/progs/IOGEAR__Kaliber-MMOmentum.bpf.c new file mode 100644 index 000000000000..225cbefdbf0e --- /dev/null +++ b/drivers/hid/bpf/progs/IOGEAR__Kaliber-MMOmentum.bpf.c @@ -0,0 +1,59 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright (c) 2023 Benjamin Tissoires + */ + +#include "vmlinux.h" +#include "hid_bpf.h" +#include "hid_bpf_helpers.h" +#include <bpf/bpf_tracing.h> + +#define VID_IOGEAR 0x258A /* VID is shared with SinoWealth and Glorious and prob others */ +#define PID_MOMENTUM 0x0027 + +HID_BPF_CONFIG( + HID_DEVICE(BUS_USB, HID_GROUP_GENERIC, VID_IOGEAR, PID_MOMENTUM) +); + +/* + * The IOGear Kaliber Gaming MMOmentum Pro mouse has multiple buttons (12) + * but only 5 are accessible out of the box because the report descriptor + * marks the other buttons as constants. + * We just fix the report descriptor to enable those missing 7 buttons. + */ + +SEC("fmod_ret/hid_bpf_rdesc_fixup") +int BPF_PROG(hid_fix_rdesc, struct hid_bpf_ctx *hctx) +{ + const u8 offsets[] = {84, 112, 140}; + __u8 *data = hid_bpf_get_data(hctx, 0 /* offset */, 4096 /* size */); + + if (!data) + return 0; /* EPERM check */ + + /* if not Keyboard */ + if (data[3] != 0x06) + return 0; + + for (int idx = 0; idx < ARRAY_SIZE(offsets); idx++) { + u8 offset = offsets[idx]; + + /* if Input (Cnst,Var,Abs) , make it Input (Data,Var,Abs) */ + if (data[offset] == 0x81 && data[offset + 1] == 0x03) + data[offset + 1] = 0x02; + } + + return 0; +} + +SEC("syscall") +int probe(struct hid_bpf_probe_args *ctx) +{ + /* only bind to the keyboard interface */ + ctx->retval = ctx->rdesc_size != 213; + if (ctx->retval) + ctx->retval = -EINVAL; + + return 0; +} + +char _license[] SEC("license") = "GPL"; |